Install and Configure openDKIM on Debian Squeeze

This guide will show you how to install and configure openDKIM on a Debian Squeeze VPS. DKIM is a signature/cryptography email authentication technology used to validate that a message was sent by an authorized source. DKIM allows an organization to take responsibility for transmitting a message, in a way that can be verified by a recipient. More information can be found at the official DKIM web site.

Comments

You add a private key here KeyFile /etc/opendkim/keys/your-domain.com/mail.private,
yet you then add multiple domain ( I have 27 domains for signing ) into other files. I suppose you are using the same key for signing all of your domains, which is a bit insecure ( or lazy ) :D